package comwyu.vegetablebirdcommuntiy.controller;


import com.google.code.kaptcha.Producer;
import comwyu.vegetablebirdcommuntiy.entity.User;
import comwyu.vegetablebirdcommuntiy.service.UserService;
import comwyu.vegetablebirdcommuntiy.util.CommunityConstant;
import comwyu.vegetablebirdcommuntiy.util.CommunityUtil;
import comwyu.vegetablebirdcommuntiy.util.RedisKeyUtil;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.CookieValue;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;

import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.Map;
import java.util.concurrent.TimeUnit;

@Controller
public class LoginController implements CommunityConstant {

    private static final Logger logger = LoggerFactory.getLogger(LoginController.class);

    @Autowired
    private UserService userService;
    @Autowired
    private Producer kaptchaProducer;
    @Value("${server.servlet.context-path}")
    private String contextPath;

    @Autowired
    @Qualifier("redisTemplate")
    private RedisTemplate redisTemplate;

    @GetMapping("/register")
    public String getRegisterPage(){
        return "/site/register";
    }

    @GetMapping("/login")
    public String getLoginPage(){
        return "/site/login";
    }


    @PostMapping("/register")
    public String register(Model model, User user){
        Map<String, Object> map = userService.register(user);
        if(map == null || map.isEmpty()){
            model.addAttribute("msg","注册成功，我们已经向您的邮箱发送了一封激活邮件，请尽快激活！");
            model.addAttribute("target","/index");
            return "/site/operate-result";
        }else{
            model.addAttribute("usernameMsg",map.get("usernameMsg"));
            model.addAttribute("passwordMsg",map.get("passwordMsg"));
            model.addAttribute("emailMsg",map.get("emailMsg"));
            return "/site/register";
        }
    }

    @GetMapping("/activation/{userId}/{code}")
    public String activation(Model model,
                             @PathVariable("userId") int userId,
                             @PathVariable("code") String code){
        int result = userService.activation(userId, code);
        if(result == ACTIVATION_SUCCESS){
            model.addAttribute("msg","激活成功，您的账号已经可以正常使用了！");
            model.addAttribute("target","/login");
        }else if(result == ACTIVATION_REPEAT){
            model.addAttribute("msg","无效操作，该账号已经被激活！");
            model.addAttribute("target","/index");
        }else{
            model.addAttribute("msg","激活失败，您提供的激活码不正确！");
            model.addAttribute("target","/index");
        }
        return "/site/operate-result";
    }

    /**
     * 生成验证码
     * @param response
     */
    @GetMapping("/kaptcha")
    public void getKaptcha(HttpServletResponse response/*, HttpSession session */){
        // 生成验证码
        String text = kaptchaProducer.createText();
        BufferedImage image = kaptchaProducer.createImage(text);

        // 将验证码存入session
//        session.setAttribute("kaptcha",text);

        // 验证码的归属
        String kaptchaOwner = CommunityUtil.generateUUID();
        Cookie cookie = new Cookie("kaptchaOwner",kaptchaOwner );
        cookie.setMaxAge(60); // 60秒
        cookie.setPath(contextPath);
        response.addCookie(cookie);
        // 将验证码存入Redis
        String kaptchaKey = RedisKeyUtil.getKaptchaKey(kaptchaOwner);
        redisTemplate.opsForValue().set(kaptchaKey,text,60, TimeUnit.SECONDS);

        // 将图片输出给浏览器
        response.setContentType("image/png");
        try {
            ServletOutputStream os = response.getOutputStream();
            ImageIO.write(image,"png",os);
        } catch (IOException e) {
            logger.error("响应验证码失败: "+e.getMessage());
        }


    }


    @PostMapping("/login")
    public String login(String username, String password, String code,
                        boolean rememberMe,Model model, /*HttpSession session,*/
                        HttpServletResponse response,
                        @CookieValue("kaptchaOwner") String kaptchaOwner){

//        String kaptcha = (String) session.getAttribute("kaptcha");
        String kaptcha = null;
        if (StringUtils.isNotBlank(kaptchaOwner)) {
            String kaptchaKey = RedisKeyUtil.getKaptchaKey(kaptchaOwner);
            kaptcha = (String) redisTemplate.opsForValue().get(kaptchaKey);
        }

        // equalsIgnoreCase 忽略大小写比较
        if(StringUtils.isBlank(kaptcha) || StringUtils.isBlank(code) || !kaptcha.equalsIgnoreCase(code)){
            model.addAttribute("codeMsg","验证码不正确！");
            return "/site/login";
        }

        // 检查账号，密码
        int expiredSeconds = rememberMe?REMEMBER_EXPIRED_SECONDS:DEFAULT_EXPIRED_SECONDS;
        Map<String, Object> map = userService.login(username, password, expiredSeconds);
        if(map.containsKey("ticket")){
            Cookie cookie = new Cookie("ticket", map.get("ticket").toString());
            cookie.setPath(contextPath);
            cookie.setMaxAge(expiredSeconds);
            response.addCookie(cookie);
            return "redirect:/index";
        }else{
            model.addAttribute("usernameMsg",map.get("usernameMsg"));
            model.addAttribute("passwordMsg",map.get("passwordMsg"));
            return "/site/login";
        }
    }

    @GetMapping("/logout")
    public String logout(@CookieValue("ticket") String ticket){
        userService.logout(ticket);
        SecurityContextHolder.clearContext();
        return "redirect:/login";
    }
}